. The Canadian entomologist. Entomology. the; CANADIAN ENTOMOLOGIST 40 Female. Can be distinguished in nature from the females of the other two species by its deep oHve brown color and the dark venation of the wings which often have a purplish sheen. Bactis propiiiqniis \\'alsh. Male. Turbinate eyes moderately large, oval, deep brown with upper half of stalk yellow ; sessile portion blackish. Face black with light green shading only at base of antenna; antennae black with white ring at apex of first joint. Thorax black, shiny, the only traces of pale markings being in the lateral sutures. Abdo
. The Canadian entomologist. Entomology. the; CANADIAN ENTOMOLOGIST 40 Female. Can be distinguished in nature from the females of the other two species by its deep oHve brown color and the dark venation of the wings which often have a purplish sheen. Bactis propiiiqniis \\'alsh. Male. Turbinate eyes moderately large, oval, deep brown with upper half of stalk yellow ; sessile portion blackish. Face black with light green shading only at base of antenna; antennae black with white ring at apex of first joint. Thorax black, shiny, the only traces of pale markings being in the lateral sutures. Abdo- men hyaline whitish with segments 7—10 light sepia brown dorsally and opaque white ventrally. Spiracles black. Legs and setse white, fore femur slightly smoky Fcuialc. Head olivaceous yellow, slightly marked with red-brown. Thor- ax dull olive brown marked slightly with yellowish laterally below wings. Ab- domen pale yellowish with series of large subdorsal brown spots on segments 2—7, these spots tending to coalesce and form stripes; segments 8—10 unicolorous yel- lowish, spiracular area slightly marked with black. Legs white, setse white. In contradistinction to the preceding and following species the veins of the primaries are Pig. 1. Relative size of turbinate eyies of a. Baetin intcrcalaris McD- quus Wal&h; c. Baetis flavistric/a MoD. b. Baetis propin- Baetis flavistriga McD. Male. Turbinate eye on a long'stalk; small, oval, light brown with a yel- lowish tinge (much lighter than in propinquus and intercalaris) ; stalk purple brown with upper third yellow. Face black with pale green markings around base of antennse and ocelli; antennae blackish. Thorax dark olivaceous (paler than in intcrcalaris) with yellowish shades on the pronotum and an oblique streak along the lateral edge running forward from base of wing; considerable pale yellow markings on the lateral sutures. Abdomen hyaline tinged with pale yel- low-brown on segments 2—;6, the posterior segm
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Keywords: ., bookcentury1800, bookdecade1860, booksubjectentomology, bookyear1
